Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

AGC (Automatic Gain Control) Amplifier

BII-2000    80 dB Dynamic Range

Automatic gain control (AGC) amplifier BII-2000 series is a dynamic adaptive electronic system, and its output signal level keeps constant although the input signal level varies in a wide range. The AGC effectively attenuates the strong input signal and amplifies weak signal. AGC can be used in SONAR Transmitting and receiving system to compensate the underwater propagation losses automatically.

Suggested Application:AGC Amplifier

  • Active Sonar System
  • Echo Sounding, Target Detection
  • Underwater Communication/Telephone/Beacons
  • Acoustic Modem, FSK Signal Conditioning
  • Avoid Saturation of Receiver or Data Logger
  • Keep Transmitting Sound Level Constant
  • Keep Weak and Loud Sound Level within Comfortable Listening Level


  • High Dynamic Range Signal Measurement: 80 dB Dynamic Range
  • Wide Frequency Range: 1 to 500 kHz, Custom

Related Products

BII-1090 Preamplifier With Programmable Gain                      BII-1030 Variable Gain Amplifier


AGC Amplifier BII-2001 BII-2002 BII-2003
Input Level Range: 2 mVpp to 20 Vpp 100 μVpp to 1 Vpp 20 μVpp to 0.2 Vpp
Input Impedance: 1 kΩ 10 MΩ 10 MΩ
Input Type: Single Ended Differential and Single ended Differential and Single Ended
Noise (RTI):   < 100 nV/√Hz 8nV/√Hz; 0.3pA/√Hz 8nV/√Hz; 0.3pA/√Hz
Current (Quiescent): 16 mA @ +24 VDC 17 mA @ +24 VDC 18.5 mA @ +24 VDC
Miscellaneous: BII-2000 Series AGC Amplifier
Operating Frequency: Available Frequency: 1 to 500 kHz.
Bandpass Filter: 1. Default: Q=2
2. Customized, specify when ordering
Note: Q = Operating Frequency/Bandwidth.
Input Dynamic Range: 80 dB
Output Level: 0.2 to 2.0 Vpp
Input Wiring: 1. Single ended: 0.15m Coax, BNC male, Label "1" (Coax)
2. Differential: 0.15m shielded cable, wire leads, Label "1" (SC)
Output Wiring: 1. 0.15m Coax, BNC male, Label "2" (Coax)
2. 0.15m shielded cable, wire leads, Label "2" (SC)
Output Type: Single Ended
Output Impedance: 100 Ω
Capability of Driving Cable: 20m
Power Supply Wiring: Power Supply: 0.15m Shielded Cable, Wire Leads
Supply Voltage: +16 to +30 VDC
Suggested DC Supply: +9VDC Battery, Marine Battery, Automobile Battery, Fixed DC Linear Power Supply, Not Included.
DO NOT use variable power supply whose maximum supply voltage is higher than the above rated voltage.
DO NOT use switching mode DC power supply.
Package: 1. Default: coated PCB (PCB)
2. Potted Unit (PU)
Size (ΦD x H): 60 x 15 mm
Operating Temperature: -40°C to 85°C
Storage Temperature: -50°C to 105°C
Technical Documents: Download BII-2000 AGC Specs.
How to order:      
BII-200x -xxx -Q -Package -Cable Type
Refer to specification Operating Frequency
in kHz
Blank: 2 (Default);
Customized: 1 to 5.
Blank or PCB: Coated PCB
PU: Potted Unit
Blank or Coax: Coax/BNC male
SC: Shielded Cable, Wire Leads
Example: Description:
BII-2001-1-SC: BII-2001, 1kHz Operating Frequency, Q of 2 (or bandwidth of 0.5kHz), Coated PCB, Shielded Cable/Wire Leads.
BII-2001-50-3-PU: BII-2001, 50kHz Operating Frequency, Q of 3 (or bandwidth of 17kHz), Potted Unit, Coax/BNC male.
BII-2002-120-PCB: BII-2002, 120kHz Operating Frequency, Q of 2 (or bandwidth of 60kHz), Coated PCB, Coax/BNC male.
BII-2002-120-3-PU-SC: BII-2002, 120kHz Operating Frequency, Q of 3 (or bandwidth of 40kHz), Potted Unit, Shielded Cable/Wire Leads.
BII-2003-420-5-Coax: BII-2003, 420kHz Operating Frequency, Q of 5 (or bandwidth of 84kHz), Coated PCB, Coax/BNC male

Go back to Products.